DRIVE ARRANGEMENT WITH ELECTROMAGNETIC BEARING MEANS AND ELASTICALLY PIVOTABLE CENTERING ELEMENT

摘要

A drive arrangement comprises a first body (1) and a second body (3) which is rotatable relative thereto, electromagnetic means for rotating the second body about an axis of rotation (5), and electromagnetic bearing means (1b, 3a) for supporting the second body relative to the first body without mechanical contact. One of the bodies has a rod-shaped centering element (7) and the other body has a central opening (9) with a centering wall (9a) surrounding the axis of rotation, a centering portion (7a) of the centering element engaging the central opening with clearance. To form an emergency bearing the rod-shaped centering element is elastically pivotable, the centering portion being capable of assuming not only a central position but also positions which are radially offset from this central position as a result of contact with the centering wall during rotation of the second body.